Integrated Soil Amendments Alleviate Subsoil Acidification and Enhance Ponkan Seedling Growth in a Column Experiment.

ABSTRACT: The ponkan (Citrus reticulata Blanco cv. Ponkan), an important citrus crop, is increasingly threatened by soil acidification. This study evaluated the efficacy of various soil amendments, including lime alone (L), lime with gypsum and organic fertilizer (LGOF), lime plus K₂CO₃ (LK), and lime with chicken manure ash (LCMA), in mitigating soil acidification and improving ponkan seedling growth. Surface-applied lime raised topsoil pH and acid buffering capacity while reducing exchangeable Al. However, combined amendments (LGOF, LK, LCMA) more effectively alleviated acidity throughout the soil profile. They significantly increased pH and buffering capacity, decreased exchangeable H and Al in the 20-40 cm layer, and elevated exchangeable base cations (K⁺,

SUBMITTER: Zhang J 

PROVIDER: S-EPMC12694400 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature